Improvement in cam attachments for steam-engines



W. H. WILSON.

CAM-ATTACHMENT FOR STEAM-ENGINES.

N0.18Z,010. Patented Sept. 5.1876.

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Q. 0 WW UNITED STATES PATENT OFFICE.

WILLIAM H. WILSON, OF PITTSBURG, AS SIGNOR OF ONE HALF HIS RIGHT TO JOSHUA MEOHEM, OF BROWNSVILLE, PENNSYLVANIA.

IMPROVEMENT IN CAM ATTACHMENTS FOR STEAM-ENGINES.

- Specification forming part of Letters Patent N 0. 182,010, dated September 5, 1876; application filed February 17, 1876.

To all whom it may concern:

Be it known that I, WM. H. WrLsoN, of Pittsburg, in the county of Allegheny, and in the State of Pennsylvania, have invented certain new and useful Improvements in Cam Attachments for Steam-Engines and do hereby declare that the following is a full, clear, and exact description thereof, reference being had. to the accompanying drawings, and to the letters of reference marked thereon, making apart of this specification.

My invention relates to stern-Wheel steamboats; and it consists in locating the cams and yokes that operate the valve forward of the stern bulk-head,-and connecting the same with the pitman, so as to be operated thereby, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which Figure 1 is a side elevation of my invention. Fig. 2 is a plan view of the same.

M M represent the cylinder-timbers, with gnidesKKfor the cross-head L. B is the pitman, connecting said cross-head with the crank G upon the main shaft H, said shaft having its bearing in a box, 0, on the cylinder-timber, extended through the stern bulkhead F. D is the cam or eccentric, operating the yoke E in the guides I I, for moving the valve of the engine.

Heretofore 1n stern-wheel boats the cam D a has always been located on the main or wheel shaft H, with the yoke and its guides at the stern in rear of the bulk-head F entirely exposed; and it has often happened that some part or parts of this mechanism has become broken by ice, drift-wood, lines, and other causes.

To obviate this difliculty is the object of my invention and to this end I remove said device from the stern of the boat, and secure the guides I to one of the cylinder-timbers in front of the rear bulk-head F at any point desired between said bulk-head and the guides of the cross-head. The cam D is then secured on a shaft, a, in a suitable box or bearing, on the top of the cylinder beam or timber, and on the other end of said shaft is secured a slotted arm or' crank, A, which straddles a pin, 1), projecting from the side of the pitman B. As the pitman is operated by the crosshead L, it, by means of the pin b and slotted arm A, imparts a continuous 'rotary motion to the cam D.

I do not claim in valve-gears a stud arranged midway of the length of the connecting-rod and operating in connection with a slotted end-lever, as I am aware that such is not new.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a stern-wheel steamboat, the valve-operating cam D, located forward of the stern bulkhead F of the boat, and connected to the cross-shaft a, in combination with the valveyoke E, pitman B having pin 1), andthe slotted arm A on the shaft a, all constructed substantially as and for the purposes herein set forth.

- In testimony that I claim the foregoing I have hereunto set my hand this 16th day of 1 February, 1876.

W. H. WILSON.

Witnesses:

M. L. STowELL, H. A. .HALL. 

